/* ==========================================================================
   抛物线科技 · 官方企业网站
   设计语言：极简现代 · 蓝灰渐变 · 抛物线元素
   ========================================================================== */

/* ===== 基础重置 ===== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  /* 主色：明亮蓝 */
  --blue-50:  #EFF6FF;
  --blue-100: #DBEAFE;
  --blue-200: #BFDBFE;
  --blue-300: #93C5FD;
  --blue-400: #60A5FA;
  --blue-500: #3B82F6;
  --blue-600: #2563EB;
  --blue-700: #1D4ED8;

  /* 中性色：深灰渐变 */
  --gray-50:  #F8FAFC;
  --gray-100: #F1F5F9;
  --gray-200: #E2E8F0;
  --gray-300: #CBD5E1;
  --gray-400: #94A3B8;
  --gray-500: #64748B;
  --gray-600: #475569;
  --gray-700: #334155;
  --gray-800: #1E293B;
  --gray-900: #0F172A;

  /* 语义色 */
  --color-primary: var(--blue-500);
  --color-primary-light: var(--blue-400);
  --color-primary-dark: var(--blue-600);
  --color-text: var(--gray-900);
  --color-text-secondary: var(--gray-600);
  --color-text-tertiary: var(--gray-400);
  --color-bg: #FFFFFF;
  --color-bg-soft: var(--gray-50);
  --color-border: var(--gray-200);
  --color-border-soft: var(--gray-100);

  /* 品牌渐变（从logo提取） */
  --gradient-brand: linear-gradient(135deg, #60A5FA 0%, #3B82F6 35%, #1E293B 100%);
  --gradient-brand-soft: linear-gradient(135deg, #DBEAFE 0%, #93C5FD 50%, #64748B 100%);
  --gradient-blue: linear-gradient(135deg, #60A5FA, #3B82F6);
  --gradient-text: linear-gradient(135deg, #1E293B 0%, #3B82F6 60%, #60A5FA 100%);

  /* 阴影 */
  --shadow-xs: 0 1px 2px rgba(15, 23, 42, 0.04);
  --shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.04), 0 1px 3px rgba(15, 23, 42, 0.06);
  --shadow-md: 0 8px 24px rgba(15, 23, 42, 0.06), 0 2px 8px rgba(15, 23, 42, 0.04);
  --shadow-lg: 0 16px 40px rgba(15, 23, 42, 0.08), 0 4px 12px rgba(15, 23, 42, 0.04);
  --shadow-blue: 0 12px 32px rgba(59, 130, 246, 0.18);
  --shadow-blue-lg: 0 20px 48px rgba(59, 130, 246, 0.25);

  /* 半径 */
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --radius-full: 999px;

  /* 过渡 */
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
  --t-fast: 0.2s var(--ease);
  --t-base: 0.4s var(--ease);
  --t-slow: 0.7s var(--ease);

  /* 容器 */
  --container: 1240px;
  --container-narrow: 960px;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei",
               "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
ul { list-style: none; }

::selection { background: rgba(59, 130, 246, 0.18); color: var(--color-text); }
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: var(--gray-100); }
::-webkit-scrollbar-thumb { background: var(--gradient-brand); border-radius: 10px; }
::-webkit-scrollbar-thumb:hover { background: var(--blue-600); }

/* ===== Logo 抛物线元素 ===== */
.logo-mark {
  display: inline-flex;
  align-items: center;
  gap: 10px;
}
.logo-mark .logo-svg {
  width: 36px;
  height: 36px;
  flex-shrink: 0;
}
.logo-mark .logo-text {
  font-size: 17px;
  font-weight: 600;
  color: var(--gray-900);
  letter-spacing: 0.5px;
  line-height: 1.1;
}
.logo-mark .logo-text small {
  display: block;
  font-size: 10px;
  font-weight: 400;
  color: var(--gray-500);
  letter-spacing: 1.5px;
  margin-top: 2px;
  text-transform: uppercase;
}

/* 抛物线装饰 SVG */
.parabola-deco {
  position: absolute;
  pointer-events: none;
  opacity: 0.6;
}

/* ===== 通用容器 ===== */
.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}
.container-narrow {
  max-width: var(--container-narrow);
  margin: 0 auto;
  padding: 0 24px;
}

/* ===== 按钮 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 28px;
  font-size: 15px;
  font-weight: 500;
  border-radius: var(--radius-full);
  transition: all var(--t-base);
  white-space: nowrap;
  position: relative;
  overflow: hidden;
}
.btn-primary {
  background: var(--gradient-brand);
  color: #fff;
  box-shadow: var(--shadow-blue);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-blue-lg);
}
.btn-primary::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, transparent 30%, rgba(255,255,255,0.3) 50%, transparent 70%);
  transform: translateX(-100%);
  transition: transform 0.6s;
}
.btn-primary:hover::before { transform: translateX(100%); }

.btn-secondary {
  background: #fff;
  color: var(--gray-800);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-xs);
}
.btn-secondary:hover {
  border-color: var(--blue-300);
  color: var(--blue-600);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

.btn-ghost {
  color: var(--gray-700);
  padding: 10px 20px;
}
.btn-ghost:hover { color: var(--blue-600); }

.btn .arrow {
  transition: transform var(--t-fast);
}
.btn:hover .arrow { transform: translateX(4px); }

/* ===== 导航栏 ===== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid transparent;
  transition: all var(--t-base);
}
.navbar.scrolled {
  background: rgba(255, 255, 255, 0.95);
  border-bottom-color: var(--color-border-soft);
  box-shadow: 0 1px 0 rgba(15, 23, 42, 0.02), 0 4px 16px rgba(15, 23, 42, 0.04);
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}
.nav-menu {
  display: flex;
  gap: 8px;
  align-items: center;
}
.nav-menu a {
  display: inline-block;
  padding: 8px 18px;
  font-size: 15px;
  font-weight: 500;
  color: var(--gray-700);
  border-radius: var(--radius-full);
  transition: all var(--t-fast);
  position: relative;
}
.nav-menu a:hover { color: var(--blue-600); background: var(--blue-50); }
.nav-menu a.active { color: var(--blue-600); background: var(--blue-50); }

.nav-actions { display: flex; gap: 12px; align-items: center; }
.nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  border-radius: var(--radius-md);
}
.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--gray-800);
  border-radius: 2px;
  transition: all var(--t-base);
}
.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ===== Hero 区域 ===== */
.hero {
  position: relative;
  padding: 160px 0 100px;
  overflow: hidden;
  background: linear-gradient(180deg, #FAFBFF 0%, #FFFFFF 100%);
}
.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 1200px;
  height: 800px;
  background: radial-gradient(ellipse at center, rgba(96, 165, 250, 0.12) 0%, transparent 60%);
  pointer-events: none;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 60px;
  align-items: center;
  position: relative;
  z-index: 2;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px 6px 6px;
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  font-size: 13px;
  font-weight: 500;
  color: var(--gray-600);
  margin-bottom: 24px;
  box-shadow: var(--shadow-xs);
}
.hero-badge .dot {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--gradient-blue);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 12px;
}
.hero h1 {
  font-size: clamp(36px, 5.4vw, 60px);
  line-height: 1.1;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--gray-900);
  margin-bottom: 24px;
}
.hero h1 .grad {
  background: var(--gradient-text);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  position: relative;
}
.hero h1 .grad::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  bottom: 6px;
  height: 8px;
  background: var(--blue-100);
  z-index: -1;
  border-radius: 4px;
}
.hero p.lead {
  font-size: 18px;
  line-height: 1.7;
  color: var(--color-text-secondary);
  margin-bottom: 36px;
  max-width: 540px;
}
.hero-cta {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 40px;
}
.hero-stats {
  display: flex;
  gap: 40px;
  padding-top: 32px;
  border-top: 1px solid var(--color-border-soft);
}
.hero-stat .num {
  font-size: 32px;
  font-weight: 700;
  color: var(--gray-900);
  line-height: 1;
  display: block;
}
.hero-stat .num .unit {
  font-size: 16px;
  color: var(--blue-500);
  margin-left: 2px;
}
.hero-stat .lbl {
  font-size: 13px;
  color: var(--color-text-tertiary);
  margin-top: 6px;
  display: block;
}

/* Hero 视觉区 */
.hero-visual {
  position: relative;
  height: 520px;
}
.hero-card {
  position: absolute;
  background: #fff;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--color-border-soft);
  overflow: hidden;
  transition: transform var(--t-base);
}
.hero-card-float {
  animation: heroFloat 6s ease-in-out infinite;
}
.hero-card-float-2 {
  animation: heroFloat 7s ease-in-out infinite;
  animation-delay: -2s;
}
.hero-card-main {
  top: 30px;
  left: 40px;
  width: 360px;
  padding: 24px;
  z-index: 3;
}
.hero-card-mini-1 {
  top: 0;
  right: 0;
  width: 200px;
  padding: 18px;
  z-index: 2;
}
.hero-card-mini-2 {
  bottom: 20px;
  right: 20px;
  width: 220px;
  padding: 18px;
  z-index: 4;
}

@keyframes heroFloat {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-12px); }
}

.chat-bubble {
  display: flex;
  gap: 12px;
  margin-bottom: 14px;
  align-items: flex-start;
}
.chat-bubble:last-child { margin-bottom: 0; }
.chat-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--gradient-brand-soft);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  flex-shrink: 0;
}
.chat-avatar.user {
  background: var(--gray-800);
  color: #fff;
}
.chat-content {
  background: var(--gray-50);
  border-radius: 12px;
  padding: 10px 14px;
  font-size: 14px;
  line-height: 1.5;
  color: var(--gray-700);
  flex: 1;
}
.chat-content.user {
  background: var(--blue-50);
  color: var(--blue-700);
}
.chat-content.ai::before {
  content: '✨';
  margin-right: 6px;
}
.typing {
  display: inline-flex;
  gap: 4px;
  align-items: center;
}
.typing span {
  width: 6px;
  height: 6px;
  background: var(--blue-400);
  border-radius: 50%;
  animation: typing 1.4s infinite;
}
.typing span:nth-child(2) { animation-delay: 0.2s; }
.typing span:nth-child(3) { animation-delay: 0.4s; }
@keyframes typing {
  0%, 60%, 100% { opacity: 0.3; transform: translateY(0); }
  30% { opacity: 1; transform: translateY(-4px); }
}

.mini-card-title {
  font-size: 12px;
  color: var(--color-text-tertiary);
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 6px;
}
.mini-card-title::before {
  content: '';
  width: 6px;
  height: 6px;
  background: var(--blue-500);
  border-radius: 50%;
}
.mini-card-value {
  font-size: 24px;
  font-weight: 700;
  color: var(--gray-900);
}
.mini-card-value .up { color: var(--blue-500); font-size: 14px; margin-left: 6px; font-weight: 500; }
.mini-bar {
  height: 4px;
  background: var(--gray-100);
  border-radius: 2px;
  margin-top: 12px;
  overflow: hidden;
}
.mini-bar > i {
  display: block;
  height: 100%;
  background: var(--gradient-blue);
  width: 0;
  animation: barFill 2s ease-out forwards;
}
@keyframes barFill {
  to { width: var(--w, 70%); }
}

/* Hero 装饰抛物线 */
.hero-parabola {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 800px;
  height: 800px;
  pointer-events: none;
  z-index: 1;
  opacity: 0.5;
}
.hero-parabola svg { width: 100%; height: 100%; }

/* ===== 通用页面头 ===== */
.page-header {
  position: relative;
  padding: 140px 0 80px;
  background: linear-gradient(180deg, #FAFBFF 0%, #FFFFFF 100%);
  overflow: hidden;
  text-align: center;
}
.page-header::before {
  content: '';
  position: absolute;
  top: -200px;
  left: 50%;
  transform: translateX(-50%);
  width: 1000px;
  height: 600px;
  background: radial-gradient(ellipse at center, rgba(96, 165, 250, 0.12) 0%, transparent 60%);
  pointer-events: none;
}
.page-header .container { position: relative; z-index: 2; }
.page-header h1 {
  font-size: clamp(36px, 5vw, 56px);
  line-height: 1.15;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--gray-900);
  margin-bottom: 18px;
}
.page-header p {
  font-size: 18px;
  color: var(--color-text-secondary);
  max-width: 720px;
  margin: 0 auto;
}
.page-header .grad {
  background: var(--gradient-text);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.breadcrumb {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--color-text-tertiary);
  margin-bottom: 24px;
  padding: 6px 14px;
  background: #fff;
  border: 1px solid var(--color-border-soft);
  border-radius: var(--radius-full);
  box-shadow: var(--shadow-xs);
}
.breadcrumb a:hover { color: var(--blue-500); }
.breadcrumb .sep { color: var(--gray-300); }

/* ===== 通用 Section ===== */
section { position: relative; }
.section { padding: 100px 0; }
.section-tight { padding: 60px 0; }
.section-head {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 60px;
}
.section-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  background: var(--blue-50);
  color: var(--blue-600);
  font-size: 13px;
  font-weight: 500;
  border-radius: var(--radius-full);
  margin-bottom: 16px;
}
.section-eyebrow::before {
  content: '';
  width: 6px;
  height: 6px;
  background: var(--blue-500);
  border-radius: 50%;
}
.section-title {
  font-size: clamp(28px, 3.6vw, 40px);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--gray-900);
  margin-bottom: 16px;
}
.section-subtitle {
  font-size: 17px;
  color: var(--color-text-secondary);
  line-height: 1.7;
}
.section-title .grad {
  background: var(--gradient-text);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* ===== 卡片 ===== */
.card {
  background: #fff;
  border: 1px solid var(--color-border-soft);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: all var(--t-base);
  position: relative;
  overflow: hidden;
}
.card:hover {
  transform: translateY(-4px);
  border-color: var(--blue-200);
  box-shadow: var(--shadow-md);
}
.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-brand);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--t-base);
}
.card:hover::before { transform: scaleX(1); }

.card-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-md);
  background: var(--blue-50);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--blue-500);
  font-size: 24px;
  margin-bottom: 20px;
  transition: all var(--t-base);
}
.card:hover .card-icon {
  background: var(--gradient-brand);
  color: #fff;
  transform: scale(1.05);
}
.card h3 {
  font-size: 19px;
  font-weight: 600;
  color: var(--gray-900);
  margin-bottom: 10px;
  line-height: 1.4;
}
.card p {
  font-size: 15px;
  color: var(--color-text-secondary);
  line-height: 1.65;
}

/* 业务网格 */
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }

/* ===== 业务亮点区 ===== */
.features {
  background: var(--color-bg-soft);
  position: relative;
}
.feature-card {
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 32px;
  border: 1px solid var(--color-border-soft);
  transition: all var(--t-base);
  position: relative;
  overflow: hidden;
}
.feature-card::after {
  content: '';
  position: absolute;
  bottom: -40px;
  right: -40px;
  width: 120px;
  height: 120px;
  background: var(--gradient-brand-soft);
  border-radius: 50%;
  opacity: 0;
  transition: all var(--t-base);
}
.feature-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: var(--blue-200);
}
.feature-card:hover::after { opacity: 0.15; transform: scale(1.5); }
.feature-card .icon-wrap {
  width: 56px;
  height: 56px;
  border-radius: 16px;
  background: var(--blue-50);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--blue-500);
  font-size: 26px;
  margin-bottom: 20px;
  position: relative;
  z-index: 1;
  transition: all var(--t-base);
}
.feature-card:hover .icon-wrap {
  background: var(--gradient-blue);
  color: #fff;
  transform: rotate(-8deg) scale(1.05);
}
.feature-card h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--gray-900);
  margin-bottom: 8px;
  position: relative;
  z-index: 1;
}
.feature-card p {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.6;
  position: relative;
  z-index: 1;
}

/* ===== 数据展示区 ===== */
.stats-section {
  position: relative;
  background: var(--gradient-brand);
  color: #fff;
  padding: 80px 0;
  overflow: hidden;
}
.stats-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle at 20% 30%, rgba(255,255,255,0.08) 0%, transparent 50%),
    radial-gradient(circle at 80% 70%, rgba(255,255,255,0.08) 0%, transparent 50%);
}
.stats-section::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  position: relative;
  z-index: 2;
}
.stat-item {
  text-align: center;
  position: relative;
}
.stat-item:not(:last-child)::after {
  content: '';
  position: absolute;
  right: -16px;
  top: 50%;
  transform: translateY(-50%);
  width: 1px;
  height: 40px;
  background: rgba(255,255,255,0.2);
}
.stat-num {
  font-size: 56px;
  font-weight: 700;
  line-height: 1;
  margin-bottom: 12px;
  background: linear-gradient(180deg, #FFFFFF 0%, #BFDBFE 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.stat-num .unit {
  font-size: 24px;
  margin-left: 4px;
  font-weight: 500;
}
.stat-lbl {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.85);
  letter-spacing: 0.5px;
}

/* ===== 产品预览 / 大型展示区 ===== */
.showcase {
  background: var(--color-bg-soft);
  position: relative;
  overflow: hidden;
}
.showcase-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}
.showcase-visual {
  position: relative;
  aspect-ratio: 1 / 1;
  max-width: 480px;
  margin: 0 auto;
}
.showcase-bg {
  position: absolute;
  inset: 0;
  background: var(--gradient-brand-soft);
  border-radius: 50%;
  opacity: 0.3;
  filter: blur(40px);
  animation: showcasePulse 4s ease-in-out infinite;
}
@keyframes showcasePulse {
  0%, 100% { transform: scale(1); opacity: 0.3; }
  50% { transform: scale(1.1); opacity: 0.4; }
}
.showcase-content {
  position: relative;
  z-index: 1;
  background: #fff;
  border-radius: var(--radius-xl);
  padding: 32px;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--color-border-soft);
}
.showcase-content h4 {
  font-size: 18px;
  font-weight: 600;
  color: var(--gray-900);
  margin-bottom: 8px;
}
.showcase-content .meta {
  font-size: 13px;
  color: var(--color-text-tertiary);
  margin-bottom: 24px;
}
.code-block {
  background: var(--gray-900);
  border-radius: var(--radius-md);
  padding: 20px;
  font-family: 'SF Mono', 'Monaco', 'Cascadia Code', 'Consolas', monospace;
  font-size: 13px;
  line-height: 1.7;
  color: var(--gray-300);
  overflow-x: auto;
  position: relative;
}
.code-block::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--blue-400), var(--blue-500), var(--gray-700));
  border-radius: var(--radius-md) var(--radius-md) 0 0;
}
.code-block .c-kw { color: #93C5FD; }
.code-block .c-str { color: #86EFAC; }
.code-block .c-fn { color: #FCD34D; }
.code-block .c-com { color: #64748B; font-style: italic; }
.code-block .c-num { color: #FCA5A5; }

.showcase-info h2 {
  font-size: 36px;
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--gray-900);
  margin-bottom: 18px;
}
.showcase-info .grad {
  background: var(--gradient-text);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.showcase-info p {
  font-size: 16px;
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-bottom: 28px;
}
.showcase-features {
  display: grid;
  gap: 14px;
  margin-bottom: 32px;
}
.showcase-feat {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 15px;
  color: var(--gray-700);
}
.showcase-feat::before {
  content: '';
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--blue-500);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='white' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='20 6 9 17 4 12'/%3E%3C/svg%3E");
  background-size: 12px;
  background-repeat: no-repeat;
  background-position: center;
  margin-top: 2px;
}

/* ===== 合作流程 ===== */
.process-section { background: #fff; }
.process-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  position: relative;
}
.process-grid::before {
  content: '';
  position: absolute;
  top: 32px;
  left: 12.5%;
  right: 12.5%;
  height: 2px;
  background: repeating-linear-gradient(90deg, var(--blue-300) 0, var(--blue-300) 8px, transparent 8px, transparent 16px);
  z-index: 0;
}
.process-step {
  text-align: center;
  position: relative;
  z-index: 1;
}
.process-num {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: #fff;
  border: 2px solid var(--blue-200);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  font-size: 22px;
  font-weight: 700;
  color: var(--blue-500);
  position: relative;
  transition: all var(--t-base);
}
.process-step:hover .process-num {
  background: var(--gradient-blue);
  color: #fff;
  border-color: var(--blue-500);
  transform: scale(1.05);
  box-shadow: var(--shadow-blue);
}
.process-step h3 {
  font-size: 17px;
  font-weight: 600;
  color: var(--gray-900);
  margin-bottom: 8px;
}
.process-step p {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.6;
  padding: 0 12px;
}

/* ===== 合作伙伴 ===== */
.partners {
  padding: 60px 0;
  background: var(--color-bg-soft);
  border-top: 1px solid var(--color-border-soft);
  border-bottom: 1px solid var(--color-border-soft);
}
.partners h4 {
  text-align: center;
  font-size: 14px;
  color: var(--color-text-tertiary);
  font-weight: 500;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  margin-bottom: 32px;
}
.partners-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 16px;
  align-items: center;
}
.partner-item {
  height: 60px;
  background: #fff;
  border: 1px solid var(--color-border-soft);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--gray-500);
  font-weight: 500;
  font-size: 15px;
  transition: all var(--t-base);
}
.partner-item:hover {
  color: var(--blue-500);
  border-color: var(--blue-200);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

/* ===== CTA 区域 ===== */
.cta-section {
  position: relative;
  padding: 100px 0;
  overflow: hidden;
  background: linear-gradient(135deg, #F8FAFC 0%, #EFF6FF 50%, #F8FAFC 100%);
}
.cta-card {
  position: relative;
  max-width: 1080px;
  margin: 0 auto;
  padding: 72px 60px;
  background: #fff;
  border-radius: var(--radius-xl);
  text-align: center;
  border: 1px solid var(--color-border-soft);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}
.cta-card::before {
  content: '';
  position: absolute;
  top: -1px;
  left: 50%;
  transform: translateX(-50%);
  width: 200px;
  height: 4px;
  background: var(--gradient-brand);
  border-radius: 0 0 4px 4px;
}
.cta-card h2 {
  font-size: 40px;
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--gray-900);
  margin-bottom: 18px;
}
.cta-card p {
  font-size: 17px;
  color: var(--color-text-secondary);
  margin-bottom: 36px;
  max-width: 560px;
  margin-left: auto;
  margin-right: auto;
}
.cta-buttons {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
}
.cta-deco {
  position: absolute;
  pointer-events: none;
  opacity: 0.5;
}
.cta-deco-1 {
  top: 30px;
  left: 30px;
  width: 120px;
  height: 120px;
}
.cta-deco-2 {
  bottom: 30px;
  right: 30px;
  width: 120px;
  height: 120px;
  transform: rotate(180deg);
}

/* ===== 页脚 ===== */
.footer {
  background: var(--gray-900);
  color: var(--gray-300);
  padding: 80px 0 30px;
  position: relative;
}
.footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--gradient-brand);
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 60px;
  margin-bottom: 60px;
}
.footer-brand {
  max-width: 320px;
}
.footer-brand .logo-text { color: #fff; }
.footer-brand p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--gray-400);
  margin: 20px 0 24px;
}
.footer-social {
  display: flex;
  gap: 12px;
}
.footer-social a {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-md);
  background: var(--gray-800);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--gray-400);
  transition: all var(--t-base);
}
.footer-social a:hover {
  background: var(--blue-500);
  color: #fff;
  transform: translateY(-2px);
}
.footer h5 {
  font-size: 15px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 20px;
  position: relative;
  padding-bottom: 12px;
}
.footer h5::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 24px;
  height: 2px;
  background: var(--blue-400);
  border-radius: 2px;
}
.footer ul li {
  margin-bottom: 12px;
}
.footer ul a {
  font-size: 14px;
  color: var(--gray-400);
  transition: all var(--t-fast);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.footer ul a:hover {
  color: var(--blue-300);
  transform: translateX(3px);
}
.footer-bottom {
  padding-top: 30px;
  border-top: 1px solid var(--gray-800);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 13px;
  color: var(--gray-500);
  flex-wrap: wrap;
  gap: 16px;
}
.footer-bottom a:hover { color: var(--blue-300); }

/* ===== 关于我们 - 时间线 ===== */
.timeline {
  position: relative;
  max-width: 880px;
  margin: 0 auto;
  padding: 40px 0;
}
.timeline::before {
  content: '';
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 2px;
  background: var(--color-border);
}
.timeline-item {
  position: relative;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 40px;
  margin-bottom: 48px;
  align-items: center;
}
.timeline-item:last-child { margin-bottom: 0; }
.timeline-content {
  background: #fff;
  border: 1px solid var(--color-border-soft);
  border-radius: var(--radius-lg);
  padding: 24px 28px;
  box-shadow: var(--shadow-sm);
  transition: all var(--t-base);
  position: relative;
}
.timeline-content:hover {
  border-color: var(--blue-200);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}
.timeline-item:nth-child(odd) .timeline-content { grid-column: 1; text-align: right; }
.timeline-item:nth-child(odd) .timeline-content::after {
  content: '';
  position: absolute;
  right: -8px;
  top: 50%;
  transform: translateY(-50%) rotate(45deg);
  width: 16px;
  height: 16px;
  background: #fff;
  border-right: 1px solid var(--color-border-soft);
  border-top: 1px solid var(--color-border-soft);
}
.timeline-item:nth-child(even) .timeline-content { grid-column: 3; }
.timeline-item:nth-child(even) .timeline-content::after {
  content: '';
  position: absolute;
  left: -8px;
  top: 50%;
  transform: translateY(-50%) rotate(45deg);
  width: 16px;
  height: 16px;
  background: #fff;
  border-left: 1px solid var(--color-border-soft);
  border-bottom: 1px solid var(--color-border-soft);
}
.timeline-dot {
  grid-column: 2;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: #fff;
  border: 3px solid var(--blue-300);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--blue-500);
  font-weight: 600;
  font-size: 13px;
  position: relative;
  z-index: 1;
  transition: all var(--t-base);
}
.timeline-item:hover .timeline-dot {
  background: var(--gradient-blue);
  color: #fff;
  border-color: var(--blue-500);
  transform: scale(1.1);
  box-shadow: var(--shadow-blue);
}
.timeline-year {
  font-size: 13px;
  font-weight: 600;
  color: var(--blue-500);
  margin-bottom: 6px;
  display: block;
}
.timeline-content h4 {
  font-size: 17px;
  font-weight: 600;
  color: var(--gray-900);
  margin-bottom: 6px;
}
.timeline-content p {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

/* ===== 团队 ===== */
.team-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.team-card {
  background: #fff;
  border: 1px solid var(--color-border-soft);
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  text-align: center;
  transition: all var(--t-base);
}
.team-card:hover {
  transform: translateY(-4px);
  border-color: var(--blue-200);
  box-shadow: var(--shadow-md);
}
.team-avatar {
  width: 96px;
  height: 96px;
  border-radius: 50%;
  background: var(--gradient-brand-soft);
  margin: 0 auto 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 36px;
  font-weight: 600;
  position: relative;
  transition: all var(--t-base);
}
.team-card:hover .team-avatar {
  transform: scale(1.05);
  box-shadow: 0 8px 24px rgba(59, 130, 246, 0.3);
}
.team-card h4 {
  font-size: 17px;
  font-weight: 600;
  color: var(--gray-900);
  margin-bottom: 4px;
}
.team-card .role {
  font-size: 13px;
  color: var(--blue-500);
  margin-bottom: 12px;
  font-weight: 500;
}
.team-card p {
  font-size: 13px;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

/* 文化价值 */
.values-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.value-card {
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  border: 1px solid var(--color-border-soft);
  transition: all var(--t-base);
  position: relative;
  overflow: hidden;
}
.value-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: var(--gradient-brand);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--t-base);
}
.value-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--blue-200);
}
.value-card:hover::before { transform: scaleX(1); }
.value-icon {
  width: 60px;
  height: 60px;
  border-radius: 16px;
  background: var(--blue-50);
  color: var(--blue-500);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  margin-bottom: 20px;
  transition: all var(--t-base);
}
.value-card:hover .value-icon {
  background: var(--gradient-blue);
  color: #fff;
  transform: rotate(-8deg);
}
.value-card h4 {
  font-size: 18px;
  font-weight: 600;
  color: var(--gray-900);
  margin-bottom: 8px;
}
.value-card p {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.65;
}

/* 资质荣誉 */
.honors-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.honor-card {
  background: #fff;
  border: 1px solid var(--color-border-soft);
  border-radius: var(--radius-md);
  padding: 24px 20px;
  text-align: center;
  transition: all var(--t-base);
}
.honor-card:hover {
  transform: translateY(-3px);
  border-color: var(--blue-300);
  box-shadow: var(--shadow-md);
}
.honor-card .badge {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--blue-50);
  color: var(--blue-500);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 26px;
  margin: 0 auto 12px;
  transition: all var(--t-base);
}
.honor-card:hover .badge {
  background: var(--gradient-blue);
  color: #fff;
  transform: scale(1.05);
}
.honor-card h5 {
  font-size: 14px;
  font-weight: 600;
  color: var(--gray-900);
  margin-bottom: 4px;
}
.honor-card .sub {
  font-size: 12px;
  color: var(--color-text-tertiary);
}

/* ===== 产品服务页 ===== */
.product-hero {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 80px;
  align-items: center;
  margin-bottom: 100px;
}
.product-visual {
  position: relative;
  perspective: 1200px;
  aspect-ratio: 4 / 5;
  max-width: 380px;
  margin: 0 auto;
}
.phone-mockup {
  position: relative;
  width: 100%;
  height: 100%;
  background: var(--gray-900);
  border-radius: 44px;
  padding: 12px;
  box-shadow: 0 30px 60px rgba(15, 23, 42, 0.2), 0 0 0 1px rgba(255,255,255,0.08);
  transform: rotateY(-12deg) rotateX(8deg);
  transition: transform var(--t-slow);
}
.product-visual:hover .phone-mockup {
  transform: rotateY(-5deg) rotateX(4deg);
}
.phone-screen {
  position: relative;
  width: 100%;
  height: 100%;
  background: linear-gradient(180deg, #FFFFFF 0%, #F8FAFC 100%);
  border-radius: 32px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}
.phone-notch {
  position: absolute;
  top: 12px;
  left: 50%;
  transform: translateX(-50%);
  width: 80px;
  height: 22px;
  background: var(--gray-900);
  border-radius: 12px;
  z-index: 10;
}
.phone-content {
  padding: 56px 18px 20px;
  flex: 1;
  display: flex;
  flex-direction: column;
}
.phone-header {
  display: flex;
  align-items: center;
  gap: 10px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--color-border-soft);
  margin-bottom: 14px;
}
.phone-header .mini-logo {
  width: 28px;
  height: 28px;
  border-radius: 8px;
  background: var(--gradient-blue);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 13px;
  font-weight: 700;
}
.phone-header .name {
  font-size: 13px;
  font-weight: 600;
  color: var(--gray-900);
}
.phone-header .status {
  font-size: 10px;
  color: var(--blue-500);
  margin-left: auto;
}
.phone-chat {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 8px;
  overflow: hidden;
}
.phone-msg {
  font-size: 12px;
  line-height: 1.5;
  padding: 8px 12px;
  border-radius: 12px;
  max-width: 85%;
}
.phone-msg.user {
  background: var(--blue-500);
  color: #fff;
  align-self: flex-end;
  border-bottom-right-radius: 4px;
}
.phone-msg.ai {
  background: var(--gray-100);
  color: var(--gray-800);
  align-self: flex-start;
  border-bottom-left-radius: 4px;
}
.phone-input {
  margin-top: auto;
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: 20px;
  padding: 8px 12px;
  display: flex;
  align-items: center;
  gap: 6px;
}
.phone-input input {
  flex: 1;
  border: none;
  outline: none;
  font-size: 12px;
  color: var(--gray-700);
  background: transparent;
}
.phone-input .send {
  width: 24px;
  height: 24px;
  background: var(--gradient-blue);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 12px;
}

.product-info .eyebrow {
  display: inline-block;
  padding: 6px 14px;
  background: var(--blue-50);
  color: var(--blue-600);
  font-size: 13px;
  font-weight: 500;
  border-radius: var(--radius-full);
  margin-bottom: 20px;
}
.product-info h2 {
  font-size: clamp(32px, 4vw, 44px);
  line-height: 1.15;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--gray-900);
  margin-bottom: 18px;
}
.product-info .grad {
  background: var(--gradient-text);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.product-info > p {
  font-size: 17px;
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-bottom: 32px;
}
.product-features {
  display: grid;
  gap: 18px;
  margin-bottom: 36px;
}
.product-feat {
  display: flex;
  gap: 14px;
  align-items: flex-start;
}
.product-feat-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: var(--blue-50);
  color: var(--blue-500);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  flex-shrink: 0;
  transition: all var(--t-base);
}
.product-feat:hover .product-feat-icon {
  background: var(--gradient-blue);
  color: #fff;
  transform: rotate(-8deg);
}
.product-feat h5 {
  font-size: 15px;
  font-weight: 600;
  color: var(--gray-900);
  margin-bottom: 4px;
}
.product-feat p {
  font-size: 13px;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

/* 业务板块 */
.business-section { background: var(--color-bg-soft); }
.business-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
.business-card {
  position: relative;
  background: #fff;
  border: 1px solid var(--color-border-soft);
  border-radius: var(--radius-lg);
  padding: 40px;
  transition: all var(--t-base);
  overflow: hidden;
}
.business-card::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 200px;
  height: 200px;
  background: var(--gradient-brand-soft);
  border-radius: 50%;
  transform: translate(40%, -40%);
  opacity: 0.1;
  transition: all var(--t-slow);
}
.business-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--blue-200);
}
.business-card:hover::before {
  transform: translate(30%, -30%) scale(1.3);
  opacity: 0.18;
}
.business-icon {
  width: 64px;
  height: 64px;
  border-radius: var(--radius-md);
  background: var(--gradient-blue);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  margin-bottom: 24px;
  position: relative;
  z-index: 1;
}
.business-card h3 {
  font-size: 22px;
  font-weight: 600;
  color: var(--gray-900);
  margin-bottom: 12px;
  position: relative;
  z-index: 1;
}
.business-card p {
  font-size: 15px;
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-bottom: 20px;
  position: relative;
  z-index: 1;
}
.business-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  position: relative;
  z-index: 1;
}
.business-list span {
  padding: 5px 12px;
  background: var(--blue-50);
  color: var(--blue-600);
  font-size: 12px;
  font-weight: 500;
  border-radius: var(--radius-full);
}

/* 解决方案 */
.solutions-section { background: #fff; }
.solutions-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.solution-card {
  position: relative;
  background: #fff;
  border: 1px solid var(--color-border-soft);
  border-radius: var(--radius-lg);
  padding: 28px;
  text-align: center;
  transition: all var(--t-base);
  overflow: hidden;
}
.solution-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 3px;
  background: var(--gradient-brand);
  transition: width var(--t-base);
}
.solution-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--blue-200);
}
.solution-card:hover::before { width: 100%; }
.solution-icon {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background: var(--blue-50);
  color: var(--blue-500);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 26px;
  margin: 0 auto 16px;
  transition: all var(--t-base);
}
.solution-card:hover .solution-icon {
  background: var(--gradient-blue);
  color: #fff;
  transform: scale(1.05);
}
.solution-card h4 {
  font-size: 16px;
  font-weight: 600;
  color: var(--gray-900);
  margin-bottom: 6px;
}
.solution-card p {
  font-size: 13px;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

/* 公司其他产品 */
.family-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.family-card {
  position: relative;
  background: #fff;
  border: 1px solid var(--color-border-soft);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  transition: all var(--t-base);
  overflow: hidden;
}
.family-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 3px;
  background: var(--gradient-brand);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--t-base);
}
.family-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--blue-200);
}
.family-card:hover::before { transform: scaleX(1); }
.family-icon {
  width: 60px; height: 60px;
  border-radius: 16px;
  background: var(--blue-50);
  color: var(--blue-500);
  display: flex; align-items: center; justify-content: center;
  font-size: 28px;
  margin-bottom: 18px;
  transition: all var(--t-base);
}
.family-card:hover .family-icon {
  background: var(--gradient-blue);
  color: #fff;
  transform: rotate(8deg);
}
.family-card h3 { font-size: 18px; font-weight: 600; color: var(--gray-900); margin-bottom: 8px; }
.family-card p { font-size: 14px; color: var(--color-text-secondary); line-height: 1.7; margin-bottom: 16px; }
.family-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 18px; }
.family-tags span {
  font-size: 12px; color: var(--blue-600);
  background: var(--blue-50);
  border: 1px solid var(--blue-100);
  padding: 4px 12px; border-radius: 999px;
}
.family-link {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 14px; font-weight: 600; color: var(--blue-600);
  text-decoration: none;
  transition: gap var(--t-base), color var(--t-base);
}
.family-link:hover { gap: 10px; color: var(--blue-700); }
.product-extra {
  font-size: 13px; color: var(--color-text-tertiary);
  margin-top: 18px; display: flex; align-items: center; gap: 8px; flex-wrap: wrap;
}
.product-extra strong { color: var(--color-text-secondary); font-weight: 600; }

/* 技术能力 */
.tech-section {
  background: linear-gradient(135deg, #0F172A 0%, #1E293B 50%, #1E3A8A 100%);
  color: #fff;
  position: relative;
  overflow: hidden;
}
.tech-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle at 30% 20%, rgba(59, 130, 246, 0.25) 0%, transparent 50%),
    radial-gradient(circle at 80% 80%, rgba(96, 165, 250, 0.18) 0%, transparent 50%);
}
.tech-section .section-head { position: relative; z-index: 1; }
.tech-section .section-eyebrow {
  background: rgba(59, 130, 246, 0.2);
  color: #93C5FD;
}
.tech-section .section-eyebrow::before { background: #60A5FA; }
.tech-section .section-title { color: #fff; }
.tech-section .section-subtitle { color: rgba(255,255,255,0.7); }
.tech-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  position: relative;
  z-index: 1;
}
.tech-item {
  padding: 24px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-md);
  backdrop-filter: blur(20px);
  transition: all var(--t-base);
}
.tech-item:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(96, 165, 250, 0.4);
  transform: translateY(-3px);
}
.tech-item h5 {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 6px;
  color: #fff;
}
.tech-item p {
  font-size: 12px;
  color: rgba(255,255,255,0.65);
  line-height: 1.5;
}

/* ===== 联系我们 ===== */
.contact-section { padding: 80px 0; }
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 60px;
  align-items: start;
}
.contact-info { position: sticky; top: 100px; }
.contact-info h2 {
  font-size: 32px;
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--gray-900);
  margin-bottom: 16px;
}
.contact-info > p {
  font-size: 16px;
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-bottom: 40px;
}
.contact-list {
  display: grid;
  gap: 24px;
}
.contact-item {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}
.contact-icon {
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background: var(--blue-50);
  color: var(--blue-500);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  transition: all var(--t-base);
}
.contact-item:hover .contact-icon {
  background: var(--gradient-blue);
  color: #fff;
  transform: scale(1.05);
}
.contact-item h5 {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text-tertiary);
  margin-bottom: 4px;
}
.contact-item p {
  font-size: 16px;
  color: var(--gray-900);
  font-weight: 500;
  line-height: 1.5;
}

/* 表单 */
.contact-form {
  background: #fff;
  border: 1px solid var(--color-border-soft);
  border-radius: var(--radius-lg);
  padding: 40px;
  box-shadow: var(--shadow-md);
}
.contact-form h3 {
  font-size: 22px;
  font-weight: 600;
  color: var(--gray-900);
  margin-bottom: 8px;
}
.contact-form .form-sub {
  font-size: 14px;
  color: var(--color-text-secondary);
  margin-bottom: 28px;
}
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 16px;
}
.form-group {
  margin-bottom: 16px;
}
.form-group label {
  display: block;
  font-size: 13px;
  font-weight: 500;
  color: var(--gray-700);
  margin-bottom: 6px;
}
.form-group label .req { color: #EF4444; }
.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 12px 14px;
  font-size: 14px;
  font-family: inherit;
  color: var(--gray-900);
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: all var(--t-fast);
  outline: none;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--blue-400);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.12);
}
.form-group textarea {
  resize: vertical;
  min-height: 120px;
}
.form-submit {
  width: 100%;
  margin-top: 8px;
  padding: 14px;
  font-size: 15px;
}
.form-tip {
  font-size: 12px;
  color: var(--color-text-tertiary);
  margin-top: 16px;
  text-align: center;
}

/* FAQ */
.faq-section { background: var(--color-bg-soft); }
.faq-list {
  max-width: 800px;
  margin: 0 auto;
}
.faq-item {
  background: #fff;
  border: 1px solid var(--color-border-soft);
  border-radius: var(--radius-md);
  margin-bottom: 12px;
  overflow: hidden;
  transition: all var(--t-base);
}
.faq-item:hover { border-color: var(--blue-200); }
.faq-question {
  width: 100%;
  padding: 20px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 15px;
  font-weight: 500;
  color: var(--gray-900);
  text-align: left;
  transition: color var(--t-fast);
}
.faq-question:hover { color: var(--blue-600); }
.faq-icon {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--blue-50);
  color: var(--blue-500);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  font-weight: 400;
  margin-left: 16px;
  transition: all var(--t-base);
}
.faq-item.open .faq-icon {
  background: var(--gradient-blue);
  color: #fff;
  transform: rotate(45deg);
}
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--t-base);
}
.faq-answer-inner {
  padding: 0 24px 22px;
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

/* ===== 入场动画 ===== */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s var(--ease), transform 0.8s var(--ease);
}
.reveal.in {
  opacity: 1;
  transform: translateY(0);
}
.reveal[data-delay="1"] { transition-delay: 0.1s; }
.reveal[data-delay="2"] { transition-delay: 0.2s; }
.reveal[data-delay="3"] { transition-delay: 0.3s; }
.reveal[data-delay="4"] { transition-delay: 0.4s; }

/* ===== 响应式 ===== */
/* 移动端触控友好基础 */
* { -webkit-tap-highlight-color: transparent; }
img, svg { max-width: 100%; height: auto; }
button, a, input, select, textarea { -webkit-tap-highlight-color: transparent; }

@media (max-width: 1100px) {
  :root { --container: 100%; }
  .grid-4 { grid-template-columns: repeat(3, 1fr); }
}

/* ===== 平板 ===== */
@media (max-width: 1024px) {
  .hero-grid, .showcase-grid, .product-hero, .contact-grid {
    grid-template-columns: 1fr;
    gap: 56px;
  }
  .hero-visual { height: 440px; max-width: 520px; margin: 0 auto; }
  .showcase-visual { max-width: 420px; }
  .product-visual { max-width: 340px; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 40px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 28px; }
  .stat-item:nth-child(2)::after { display: none; }
  .process-grid { grid-template-columns: repeat(2, 1fr); gap: 32px; }
  .process-grid::before { display: none; }
  .team-grid, .tech-grid { grid-template-columns: repeat(2, 1fr); }
  .partners-grid { grid-template-columns: repeat(3, 1fr); }
  .solutions-grid { grid-template-columns: repeat(2, 1fr); }
  .family-grid { grid-template-columns: repeat(2, 1fr); }
  .honors-grid { grid-template-columns: repeat(2, 1fr); }
  .contact-info { position: static; }
}

/* ===== 手机 / 小平板 ===== */
@media (max-width: 768px) {
  .container { padding: 0 20px; }
  .container-narrow { padding: 0 20px; }
  .section { padding: 56px 0; }
  .section-head { margin-bottom: 44px; }
  .section-title { font-size: clamp(26px, 6vw, 34px); }
  .section-subtitle { font-size: 15px; }

  .hero { padding: 116px 0 56px; }
  .hero h1 { font-size: clamp(30px, 9vw, 44px); }
  .hero p.lead { font-size: 16px; }
  .hero-stats { gap: 22px; flex-wrap: wrap; }
  .hero-stat { min-width: 88px; }
  .hero-stat .num { font-size: 26px; }
  .hero-cta { flex-direction: column; }
  .hero-cta .btn { width: 100%; }

  .page-header { padding: 104px 0 48px; }
  .page-header h1 { font-size: clamp(30px, 8vw, 44px); }
  .page-header p { font-size: 16px; }

  /* 移动端导航抽屉 */
  .nav-inner { height: 60px; }
  .nav-menu {
    position: fixed;
    top: 60px;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: saturate(180%) blur(20px);
    -webkit-backdrop-filter: saturate(180%) blur(20px);
    flex-direction: column;
    align-items: stretch;
    padding: 12px 16px 20px;
    gap: 4px;
    box-shadow: 0 12px 32px rgba(15, 23, 42, 0.10);
    transform: translateY(-120%);
    opacity: 0;
    visibility: hidden;
    transition: transform var(--t-base), opacity var(--t-base), visibility var(--t-base);
    border-top: 1px solid var(--color-border-soft);
    max-height: calc(100vh - 60px);
    overflow-y: auto;
  }
  .nav-menu.open { transform: translateY(0); opacity: 1; visibility: visible; }
  .nav-menu a {
    width: 100%;
    padding: 14px 18px;
    border-radius: var(--radius-md);
    font-size: 16px;
  }
  .nav-toggle { display: flex; }
  .nav-actions .btn:not(.btn-primary) { display: none; }
  .nav-actions .btn-primary { padding: 10px 18px; font-size: 14px; }

  /* Hero 视觉：移动端只保留主对话卡，避免绝对定位溢出 */
  .hero-visual { height: auto; max-width: 100%; margin: 0 auto; }
  .hero-card-mini-1, .hero-card-mini-2 { display: none; }
  .hero-card-main {
    position: relative;
    top: auto;
    left: auto;
    width: 100%;
    margin: 0 auto;
  }
  .hero-parabola { width: 480px; height: 480px; opacity: 0.35; }

  /* 栅格统一单列 */
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; gap: 16px; }
  .business-grid, .values-grid { grid-template-columns: 1fr; gap: 16px; }
  .process-grid { grid-template-columns: repeat(2, 1fr); gap: 28px; }
  .process-grid::before { display: none; }
  .team-grid, .tech-grid { grid-template-columns: repeat(2, 1fr); gap: 14px; }
  .partners-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; }
  .solutions-grid { grid-template-columns: 1fr; }
  .family-grid { grid-template-columns: 1fr; }
  .honors-grid { grid-template-columns: repeat(2, 1fr); }

  /* 卡片内边距收紧 */
  .card, .feature-card, .business-card, .value-card, .solution-card, .honor-card, .family-card { padding: 24px 20px; }
  .feature-card .icon-wrap, .card-icon, .value-icon { width: 48px; height: 48px; font-size: 22px; }

  /* CTA 全宽按钮 */
  .cta-section { padding: 64px 0; }
  .cta-card { padding: 44px 24px; }
  .cta-card h2 { font-size: 26px; }
  .cta-buttons { flex-direction: column; }
  .cta-buttons .btn { width: 100%; }

  /* 时间线左对齐单列 */
  .timeline::before { left: 16px; }
  .timeline-item { grid-template-columns: 32px 1fr; gap: 16px; }
  .timeline-dot { grid-column: 1; width: 32px; height: 32px; font-size: 11px; }
  .timeline-content { grid-column: 2 !important; text-align: left !important; padding: 18px 20px; }
  .timeline-content::after { display: none; }

  /* 表单 */
  .form-row { grid-template-columns: 1fr; }
  .contact-form { padding: 28px 20px; }
  .contact-grid { gap: 40px; }

  /* 产品页 */
  .product-visual { max-width: 260px; }
  .product-hero { margin-bottom: 56px; }

  /* 页脚 */
  .footer { padding: 56px 0 24px; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; text-align: center; gap: 12px; }
  .footer-bottom > div { flex-wrap: wrap; justify-content: center; }
}

/* ===== 小屏手机 ===== */
@media (max-width: 480px) {
  .container { padding: 0 16px; }
  .hero h1 { font-size: clamp(27px, 8.5vw, 36px); }
  .section-title, .cta-card h2 { font-size: 24px; }
  .stat-num { font-size: 40px; }
  .stat-num .unit { font-size: 18px; }
  .stats-grid { gap: 14px; }
  .stat-lbl { font-size: 12px; }
  .hero-stat .num { font-size: 24px; }
  .footer-bottom > div { gap: 14px; }
  .contact-item { gap: 12px; }
  .contact-icon { width: 42px; height: 42px; font-size: 18px; }
  .showcase-content { padding: 24px 18px; }
  .code-block { font-size: 12px; padding: 16px; }
  .cta-deco { display: none; }
}

/* ===== 横屏小高度设备 ===== */
@media (max-height: 500px) and (orientation: landscape) {
  .nav-inner { height: 54px; }
  .nav-menu { top: 54px; }
}